Let the drill do the work; do not apply too much pressure as this may result in the tile or glass breaking. 3 Piece Tile & Glass Drill Bit Set. Suitable for 1/4" hex quick change chucks.
eBay
The dry diamond drill bit uses vacuum brazed technology, which allows it to be used at a higher temperature to cut through hard porcelain tile, ceramics, marble, and slate with ease. Vacuum Brazed Diamond drilling bits for dry drilling of granite, marble, masonry, concrete, tile/ceramic, glass, hard plastic, etc.
eBay
Name:Diamond Drill Bits Material: Diamond Head diameter: 0#(2.2-2.4mm)、1#(1.9-2.0mm)、2#(1.7-1.8mm)、3#(1.5-1.6mm)、4#(1.3-1.4mm)、5#(1.1-1.2mm)、6#(0.9-1.0mm)、7#(0.8-0.9mm)
eBay
Widely Be Used for Glass, Tile, Wood, Ceramic, Brick, Wall, Etc. Size：3mm 4mm 5mm 6mm 8mm 10mm 12mm. High-efficiency Spiral Chip Removal, Effective Chip Removal, Smooth and Flat Non-stick Knife, Smoother Drilling.
eBay
●Suitable for materials: Ceramic tile, Vitrified tile, Ceramic, Glass, Marble, Granite, Microcrystalline stone, Quartz stone. ● The appearance of the product will be slightly different. For example, the hole saw with a size below 25mm is a hollow shank, and the hole saw with a size above 28mm is a solid shank.
eBay
23Pcs Wood Chamfer Drilling Bits Plug Cutter Three Pointed Countersink Drill Bit. 3/5X Dry Diamond Drill Bit For Granite Tile Glass Porcelain Marble Ceramic UK. 3pcs dry core drill 6/8/10mm 6mm hole saw marble granite tile.
eBay
Overheating the bit will blunt it and affect performance. Let the drill do the work; do not apply too much pressure as this may result in the tile or glass breaking. 3 Piece Tile & Glass Drill Bit Set.
eBay
HEX POWER BITS: The drill shank is cut into solid hex shape, which makes the drill clamping more secure and drilling less slippy. UNIQUE CROSS DESIGN: Hex power bits feature a unique cross angle design for low shear strength and stable, fast drilling with no broken edges.
eBay